@flyingemolga
VAPI uses a dynamic range of IP addresses to communicate with your servers, which means that the IP addresses can change over time. To ensure secure communication while restricting access, you might consider using other methods such as:
1. Validating incoming requests by verifying signatures in the headers.
2. Using a secret token that is passed with each request and verified on your server.
3. Employing a firewall that supports dynamic DNS, if you have a fixed domain name for VAPI's endpoints.
For the most up-to-date information on IP ranges, if VAPI does provide them, or for assistance with implementing secure methods of validation, please ask support for more info on this.